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Finding the Fourth Proportional to 173.64, 260.50 and 90.28

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Solution

The fourth proportional to 173.64, 260.50 and 90.28 is: 135.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.64 : 260.50 = 90.28 : x
  2. Step 2: Convert to fraction form
    173.64/260.50 = 90.28/x
  3. Step 3: Cross multiply
    173.64x = 260.50 × 90.28
  4. Step 4: Simplify right side
    173.64x = 23,517.94
  5. Step 5: Solve for x
    x = 23,517.94/173.64
  6. Step 6: Final answer
    x = 135.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.